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[目的]分析2009—2010年南通市甲型H1N1流感(甲流)的流行特征,为其防控提供依据。[方法]对中国疾病预防控制信息系统中2009—2010年南通市甲流个案信息和聚集性疫情进行描述性流行病学分析。[结果]2009年和2010年南通市甲流发病率分别为8.24/10万和1.03/10万。2009年崇川区发病率最高,其次为港闸区和开发区。病例主要集中在0~29岁年龄段,占发病总数的81.56%,学生病例占53.76%。疫情在2009年9月和12月形成2次流行高峰,2010年5月起无病例报告。2009年报告14起聚集性疫情,均发生在校园。[结论]0~29岁的儿童、青少年是甲流防控的重点人群。对人群易感状态进行持续监测,对病原体变异情况开展常规监测,实现甲流监测体系的高敏感性和高特异性,对进一步防控甲流有重要意义。
[Objective] To analyze the epidemic characteristics of Influenza A (H1N1) influenza in Nantong from 2009 to 2010 and provide the basis for its prevention and control. [Methods] Descriptive epidemiological analysis of case information and cluster epidemic situation of Nailong-A from 2009 to 2010 in China’s disease prevention and control information system was conducted. [Results] The prevalence rates of influenza A in Nantong in 2009 and 2010 were 8.24 / lakh and 1.03 / lakh respectively. Chongchuan District in 2009 the highest incidence, followed by Gangzha District and Development Zone. The cases mainly concentrated in the 0 to 29 age group, accounting for 81.56% of the total number of cases, student cases accounted for 53.76%. The epidemic peaked at two epidemic peaks in September and December 2009, with no case reports since May 2010. In 2009, a total of 14 cluster outbreaks were reported, all on campus. [Conclusion] Children and adolescents aged 0 ~ 29 years are the key population for prevention and control of Influenza A. It is important to further monitor and control the flow of influenza by continuously monitoring the susceptibility status of the population and routine monitoring of the variation of the pathogens to achieve the high sensitivity and specificity of the monitoring system of the influenza A virus.